With the recent release of Visual Studio 2012 Color Theme Editor, in addition to the light and dark themes, you can now select from 5 more themes and even choose your own colors:
Theme selection in Visual Studio 2012
I’ve updated Tabs Studio to support custom Visual Studio 2012 colors. Instead of two hardcoded light and dark styles, Tabs Studio now uses a single VS 2012 styles collection with direct binding to current VS 2012 shell colors. Each change in Visual Studio 2012 tab colors is now immediately reflected in Tabs Studio tab colors. For example, this is how Tabs Studio looks after selecting the blue theme:
Visual Studio 2012 blue theme
Tabs Studio Blog (organizing Visual Studio document tabs) 